The RV Electronics LCD Triple Tank Water Level Gauge is an innovative solution for monitoring water levels in RVs. It features a colored LCD analog display with LED backlighting for clear viewing in any condition. This gauge displays five levels, requires a 12V supply, and is remarkably energy-efficient, drawing only 50 mA. Its power on/off switch adds convenience, and it's compatible with various lead sender probe lengths, making it a versatile tool for managing water resources efficiently in your RV. THESE PRICES ARE FOR THE GAUGE ONLY. RV TANK SENDER PROBES ARE REQUIRED.If you don't have a 12 volt supply consider the LCD water gauge versions as they have an on-board battery.